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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>E.18. Release 10.6</title><link rel="stylesheet" type="text/css" href="stylesheet.css" /><link rev="made" href="[email protected]" /><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /><link rel="prev" href="release-10-7.html" title="E.17. Release 10.7" /><link rel="next" href="release-10-5.html" title="E.19. Release 10.5" /></head><body><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">E.18. Release 10.6</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="release-10-7.html" title="E.17. Release 10.7">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="release.html" title="Appendix E. Release Notes">Up</a></td><th width="60%" align="center">Appendix E. Release Notes</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 10.23 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="release-10-5.html" title="E.19. Release 10.5">Next</a></td></tr></table><hr></hr></div><div class="sect1" id="RELEASE-10-6"><div class="titlepage"><div><div><h2 class="title" style="clear: both">E.18. Release 10.6</h2></div></div></div><div class="toc"><dl class="toc"><dt><span class="sect2"><a href="release-10-6.html#id-1.11.6.22.4">E.18.1. Migration to Version 10.6</a></span></dt><dt><span class="sect2"><a href="release-10-6.html#id-1.11.6.22.5">E.18.2. Changes</a></span></dt></dl></div><p><strong>Release date: </strong>2018-11-08</p><p> This release contains a variety of fixes from 10.5.
For information about new features in major release 10, see
<a class="xref" href="release-10.html" title="E.24. Release 10">Section E.24</a>.
</p><div class="sect2" id="id-1.11.6.22.4"><div class="titlepage"><div><div><h3 class="title">E.18.1. Migration to Version 10.6</h3></div></div></div><p> A dump/restore is not required for those running 10.X.
</p><p> However, if you use the <code class="filename">pg_stat_statements</code> extension,
see the changelog entry below about that.
</p><p> Also, if you are upgrading from a version earlier than 10.4,
see <a class="xref" href="release-10-4.html" title="E.20. Release 10.4">Section E.20</a>.
</p></div><div class="sect2" id="id-1.11.6.22.5"><div class="titlepage"><div><div><h3 class="title">E.18.2. Changes</h3></div></div></div><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p> Ensure proper quoting of transition table names
when <span class="application">pg_dump</span> emits <code class="command">CREATE TRIGGER
... REFERENCING</code> commands (Tom Lane)
</p><p> This oversight could be exploited by an unprivileged user to gain
superuser privileges during the next dump/reload
or <span class="application">pg_upgrade</span> run. (CVE-2018-16850)
</p></li><li class="listitem"><p> Fix corner-case failures
in <code class="function">has_<em class="replaceable"><code>foo</code></em>_privilege()</code>
family of functions (Tom Lane)
</p><p> Return NULL rather than throwing an error when an invalid object OID
is provided. Some of these functions got that right already, but not
all. <code class="function">has_column_privilege()</code> was additionally
capable of crashing on some platforms.
</p></li><li class="listitem"><p> Fix <code class="function">pg_get_partition_constraintdef()</code> to return
NULL rather than fail when passed an invalid relation OID (Tom Lane)
</p></li><li class="listitem"><p> Avoid O(N^2) slowdown in regular expression match/split functions on
long strings (Andrew Gierth)
</p></li><li class="listitem"><p> Fix parsing of standard multi-character operators that are immediately
followed by a comment or <code class="literal">+</code> or <code class="literal">-</code>
(Andrew Gierth)
</p><p> This oversight could lead to parse errors, or to incorrect assignment
of precedence.
</p></li><li class="listitem"><p> Avoid O(N^3) slowdown in lexer for long strings
of <code class="literal">+</code> or <code class="literal">-</code> characters
(Andrew Gierth)
</p></li><li class="listitem"><p> Fix mis-execution of SubPlans when the outer query is being scanned
backwards (Andrew Gierth)
</p></li><li class="listitem"><p> Fix failure of <code class="command">UPDATE/DELETE ... WHERE CURRENT OF ...</code>
after rewinding the referenced cursor (Tom Lane)
</p><p> A cursor that scans multiple relations (particularly an inheritance
tree) could produce wrong behavior if rewound to an earlier relation.
</p></li><li class="listitem"><p> Fix <code class="function">EvalPlanQual</code> to handle conditionally-executed
InitPlans properly (Andrew Gierth, Tom Lane)
</p><p> This resulted in hard-to-reproduce crashes or wrong answers in
concurrent updates, if they contained code such as an uncorrelated
sub-<code class="literal">SELECT</code> inside a <code class="literal">CASE</code>
construct.
</p></li><li class="listitem"><p> Prevent creation of a partition in a trigger attached to its parent
table (Amit Langote)
</p><p> Ideally we'd allow that, but for the moment it has to be blocked to
avoid crashes.
</p></li><li class="listitem"><p> Fix problems with applying <code class="literal">ON COMMIT DELETE ROWS</code> to
a partitioned temporary table (Amit Langote)
</p></li><li class="listitem"><p> Fix character-class checks to not fail on Windows for Unicode
characters above U+FFFF (Tom Lane, Kenji Uno)
</p><p> This bug affected full-text-search operations, as well
as <code class="filename">contrib/ltree</code>
and <code class="filename">contrib/pg_trgm</code>.
</p></li><li class="listitem"><p> Disallow pushing sub-<code class="literal">SELECT</code>s containing window
functions, <code class="literal">LIMIT</code>, or <code class="literal">OFFSET</code> to
parallel workers (Amit Kapila)
</p><p> Such cases could result in inconsistent behavior due to different
workers getting different answers, as a result of indeterminacy
due to row-ordering variations.
</p></li><li class="listitem"><p> Ensure that sequences owned by a foreign table are processed
by <code class="literal">ALTER OWNER</code> on the table (Peter Eisentraut)
</p><p> The ownership change should propagate to such sequences as well, but
this was missed for foreign tables.
</p></li><li class="listitem"><p> Ensure that the server will process
already-received <code class="literal">NOTIFY</code>
and <code class="literal">SIGTERM</code> interrupts before waiting for client
input (Jeff Janes, Tom Lane)
</p></li><li class="listitem"><p> Fix over-allocation of space for <code class="function">array_out()</code>'s
result string (Keiichi Hirobe)
</p></li><li class="listitem"><p> Avoid query-lifetime memory leak in <code class="literal">XMLTABLE</code>
(Andrew Gierth)
</p></li><li class="listitem"><p> Fix memory leak in repeated SP-GiST index scans (Tom Lane)
</p><p> This is only known to amount to anything significant in cases where
an exclusion constraint using SP-GiST receives many new index entries
in a single command.
</p></li><li class="listitem"><p> Ensure that <code class="function">ApplyLogicalMappingFile()</code> closes the
mapping file when done with it (Tomas Vondra)
</p><p> Previously, the file descriptor was leaked, eventually resulting in
failures during logical decoding.
</p></li><li class="listitem"><p> Fix logical decoding to handle cases where a mapped catalog table is
repeatedly rewritten, e.g., by <code class="literal">VACUUM FULL</code>
(Andres Freund)
</p></li><li class="listitem"><p> Prevent starting the server with <code class="varname">wal_level</code> set
to too low a value to support an existing replication slot (Andres
Freund)
</p></li><li class="listitem"><p> Avoid crash if a utility command causes infinite recursion (Tom Lane)
</p></li><li class="listitem"><p> When initializing a hot standby, cope with duplicate XIDs caused by
two-phase transactions on the master
(Michael Paquier, Konstantin Knizhnik)
</p></li><li class="listitem"><p> Fix event triggers to handle nested <code class="command">ALTER TABLE</code>
commands (Michael Paquier, Álvaro Herrera)
</p></li><li class="listitem"><p> Propagate parent process's transaction and statement start timestamps
to parallel workers (Konstantin Knizhnik)
</p><p> This prevents misbehavior of functions such
as <code class="function">transaction_timestamp()</code> when executed in a
worker.
</p></li><li class="listitem"><p> Fix transfer of expanded datums to parallel workers so that alignment
is preserved, preventing crashes on alignment-picky platforms
(Tom Lane, Amit Kapila)
</p></li><li class="listitem"><p> Fix WAL file recycling logic to work correctly on standby servers
(Michael Paquier)
</p><p> Depending on the setting of <code class="varname">archive_mode</code>, a standby
might fail to remove some WAL files that could be removed.
</p></li><li class="listitem"><p> Fix handling of commit-timestamp tracking during recovery
(Masahiko Sawada, Michael Paquier)
</p><p> If commit timestamp tracking has been turned on or off, recovery might
fail due to trying to fetch the commit timestamp for a transaction
that did not record it.
</p></li><li class="listitem"><p> Randomize the <code class="function">random()</code> seed in bootstrap and
standalone backends, and in <span class="application">initdb</span>
(Noah Misch)
</p><p> The main practical effect of this change is that it avoids a scenario
where <span class="application">initdb</span> might mistakenly conclude that
POSIX shared memory is not available, due to name collisions caused by
always using the same random seed.
</p></li><li class="listitem"><p> Fix possible shared-memory corruption in DSA logic (Thomas Munro)
</p></li><li class="listitem"><p> Allow DSM allocation to be interrupted (Chris Travers)
</p></li><li class="listitem"><p> Avoid failure in a parallel worker when loading an extension that
tries to access system caches within its init function (Thomas Munro)
</p><p> We don't consider that to be good extension coding practice, but it
mostly worked before parallel query, so continue to support it for
now.
</p></li><li class="listitem"><p> Properly handle turning <code class="varname">full_page_writes</code> on
dynamically (Kyotaro Horiguchi)
</p></li><li class="listitem"><p> Fix possible crash due to double <code class="function">free()</code> during
SP-GiST rescan (Andrew Gierth)
</p></li><li class="listitem"><p> Prevent mis-linking of src/port and src/common functions on ELF-based
BSD platforms, as well as HP-UX and Solaris (Andrew Gierth, Tom Lane)
</p><p> Shared libraries loaded into a backend's address space could use the
backend's versions of these functions, rather than their own copies as
intended. Since the behavior of the two sets of functions isn't
quite the same, this led to failures.
</p></li><li class="listitem"><p> Avoid possible buffer overrun when replaying GIN page recompression
from WAL (Alexander Korotkov, Sivasubramanian Ramasubramanian)
</p></li><li class="listitem"><p> Avoid overrun of a hash index's metapage
when <code class="literal">BLCKSZ</code> is smaller than default (Dilip Kumar)
</p></li><li class="listitem"><p> Fix missed page checksum updates in hash indexes (Amit Kapila)
</p></li><li class="listitem"><p> Fix missed fsync of a replication slot's directory (Konstantin
Knizhnik, Michael Paquier)
</p></li><li class="listitem"><p> Fix unexpected timeouts when
using <code class="varname">wal_sender_timeout</code> on a slow server
(Noah Misch)
</p></li><li class="listitem"><p> Ensure that hot standby processes use the correct WAL consistency
point (Alexander Kukushkin, Michael Paquier)
</p><p> This prevents possible misbehavior just after a standby server has
reached a consistent database state during WAL replay.
</p></li><li class="listitem"><p> Ensure background workers are stopped properly when the postmaster
receives a fast-shutdown request before completing database startup
(Alexander Kukushkin)
</p></li><li class="listitem"><p> Update the free space map during WAL replay of page all-visible/frozen
flag changes (Álvaro Herrera)
</p><p> Previously we were not careful about this, reasoning that the FSM is
not critical data anyway. However, if it's sufficiently out of date,
that can result in significant performance degradation after a standby
has been promoted to primary. The FSM will eventually be healed by
updates, but we'd like it to be good sooner, so work harder at
maintaining it during WAL replay.
</p></li><li class="listitem"><p> Avoid premature release of parallel-query resources when query end or
tuple count limit is reached (Amit Kapila)
</p><p> It's only okay to shut down the executor at this point if the caller
cannot demand backwards scan afterwards.
</p></li><li class="listitem"><p> Don't run atexit callbacks when servicing <code class="literal">SIGQUIT</code>
(Heikki Linnakangas)
</p></li><li class="listitem"><p> Don't record foreign-server user mappings as members of extensions
(Tom Lane)
</p><p> If <code class="command">CREATE USER MAPPING</code> is executed in an extension
script, an extension dependency was created for the user mapping,
which is unexpected. Roles can't be extension members, so user
mappings shouldn't be either.
</p></li><li class="listitem"><p> Make syslogger more robust against failures in opening CSV log files
(Tom Lane)
</p></li><li class="listitem"><p> When <span class="application">libpq</span> is given multiple target host
names, do the DNS lookups one at a time, not all at once (Tom Lane)
</p><p> This prevents unnecessary failures or slow connections when a
connection is successfully made to one of the earlier servers in the
list.
</p></li><li class="listitem"><p> Fix <span class="application">libpq</span>'s handling of connection timeouts
so that they are properly applied per host name or IP address (Tom Lane)
</p><p> Previously, some code paths failed to restart the timer when switching
to a new target host, possibly resulting in premature timeout.
</p></li><li class="listitem"><p> Fix <span class="application">psql</span>, as well as documentation
examples, to call <code class="function">PQconsumeInput()</code> before
each <code class="function">PQnotifies()</code> call (Tom Lane)
</p><p> This fixes cases in which <span class="application">psql</span> would not
report receipt of a <code class="literal">NOTIFY</code> message until after the
next command.
</p></li><li class="listitem"><p> Fix <span class="application">pg_dump</span>'s
<code class="option">--no-publications</code> option to also ignore publication
tables (Gilles Darold)
</p></li><li class="listitem"><p> In <span class="application">pg_dump</span>, exclude identity sequences when
their parent table is excluded from the dump (David Rowley)
</p></li><li class="listitem"><p> Fix possible inconsistency in <span class="application">pg_dump</span>'s
sorting of dissimilar object names (Jacob Champion)
</p></li><li class="listitem"><p> Ensure that <span class="application">pg_restore</span> will schema-qualify
the table name when
emitting <code class="literal">DISABLE</code>/<code class="literal">ENABLE TRIGGER</code>
commands (Tom Lane)
</p><p> This avoids failures due to the new policy of running restores with
restrictive search path.
</p></li><li class="listitem"><p> Fix <span class="application">pg_upgrade</span> to handle event triggers in
extensions correctly (Haribabu Kommi)
</p><p> <span class="application">pg_upgrade</span> failed to preserve an event
trigger's extension-membership status.
</p></li><li class="listitem"><p> Fix <span class="application">pg_upgrade</span>'s cluster state check to
work correctly on a standby server (Bruce Momjian)
</p></li><li class="listitem"><p> Enforce type <code class="type">cube</code>'s dimension limit in
all <code class="filename">contrib/cube</code> functions (Andrey Borodin)
</p><p> Previously, some cube-related functions could construct values that
would be rejected by <code class="function">cube_in()</code>, leading to
dump/reload failures.
</p></li><li class="listitem"><p> In <code class="filename">contrib/pg_stat_statements</code>, disallow
the <code class="literal">pg_read_all_stats</code> role from
executing <code class="function">pg_stat_statements_reset()</code>
(Haribabu Kommi)
</p><p> <code class="literal">pg_read_all_stats</code> is only meant to grant permission
to read statistics, not to change them, so this grant was incorrect.
</p><p> To cause this change to take effect, run <code class="literal">ALTER EXTENSION
pg_stat_statements UPDATE</code> in each database
where <code class="filename">pg_stat_statements</code> has been installed.
</p></li><li class="listitem"><p> In <code class="filename">contrib/postgres_fdw</code>, don't try to ship a
variable-free <code class="literal">ORDER BY</code> clause to the remote server
(Andrew Gierth)
</p></li><li class="listitem"><p> Fix <code class="filename">contrib/unaccent</code>'s
<code class="function">unaccent()</code> function to use
the <code class="literal">unaccent</code> text search dictionary that is in the
same schema as the function (Tom Lane)
</p><p> Previously it tried to look up the dictionary using the search path,
which could fail if the search path has a restrictive value.
</p></li><li class="listitem"><p> Fix build problems on macOS 10.14 (Mojave) (Tom Lane)
</p><p> Adjust <span class="application">configure</span> to add
an <code class="option">-isysroot</code> switch to <code class="varname">CPPFLAGS</code>;
without this, PL/Perl and PL/Tcl fail to configure or build on macOS
10.14. The specific sysroot used can be overridden at configure time
or build time by setting the <code class="varname">PG_SYSROOT</code> variable in
the arguments of <span class="application">configure</span>
or <span class="application">make</span>.
</p><p> It is now recommended that Perl-related extensions
write <code class="literal">$(perl_includespec)</code> rather
than <code class="literal">-I$(perl_archlibexp)/CORE</code> in their compiler
flags. The latter continues to work on most platforms, but not recent
macOS.
</p><p> Also, it should no longer be necessary to
specify <code class="option">--with-tclconfig</code> manually to get PL/Tcl to
build on recent macOS releases.
</p></li><li class="listitem"><p> Fix MSVC build and regression-test scripts to work on recent Perl
versions (Andrew Dunstan)
</p><p> Perl no longer includes the current directory in its search path
by default; work around that.
</p></li><li class="listitem"><p> On Windows, allow the regression tests to be run by an Administrator
account (Andrew Dunstan)
</p><p> To do this safely, <span class="application">pg_regress</span> now gives up
any such privileges at startup.
</p></li><li class="listitem"><p> Allow btree comparison functions to return <code class="literal">INT_MIN</code>
(Tom Lane)
</p><p> Up to now, we've forbidden datatype-specific comparison functions from
returning <code class="literal">INT_MIN</code>, which allows callers to invert
the sort order just by negating the comparison result. However, this
was never safe for comparison functions that directly return the
result of <code class="function">memcmp()</code>, <code class="function">strcmp()</code>,
etc, as POSIX doesn't place any such restriction on those functions.
At least some recent versions of <code class="function">memcmp()</code> can
return <code class="literal">INT_MIN</code>, causing incorrect sort ordering.
Hence, we've removed this restriction. Callers must now use
the <code class="literal">INVERT_COMPARE_RESULT()</code> macro if they wish to
invert the sort order.
</p></li><li class="listitem"><p> Fix recursion hazard in shared-invalidation message processing
(Tom Lane)
</p><p> This error could, for example, result in failure to access a system
catalog or index that had just been processed by <code class="command">VACUUM
FULL</code>.
</p><p> This change adds a new result code
for <code class="function">LockAcquire</code>, which might possibly affect
external callers of that function, though only very unusual usage
patterns would have an issue with it. The API
of <code class="function">LockAcquireExtended</code> is also changed.
</p></li><li class="listitem"><p> Save and restore SPI's global variables
during <code class="function">SPI_connect()</code>
and <code class="function">SPI_finish()</code> (Chapman Flack, Tom Lane)
</p><p> This prevents possible interference when one SPI-using function calls
another.
</p></li><li class="listitem"><p> Avoid using potentially-under-aligned page buffers (Tom Lane)
</p><p> Invent new union types <code class="type">PGAlignedBlock</code>
and <code class="type">PGAlignedXLogBlock</code>, and use these in place of plain
char arrays, ensuring that the compiler can't place the buffer at a
misaligned start address. This fixes potential core dumps on
alignment-picky platforms, and may improve performance even on
platforms that allow misalignment.
</p></li><li class="listitem"><p> Make <code class="filename">src/port/snprintf.c</code> follow the C99
standard's definition of <code class="function">snprintf()</code>'s result
value (Tom Lane)
</p><p> On platforms where this code is used (mostly Windows), its pre-C99
behavior could lead to failure to detect buffer overrun, if the
calling code assumed C99 semantics.
</p></li><li class="listitem"><p> When building on i386 with the <span class="application">clang</span>
compiler, require <code class="option">-msse2</code> to be used (Andres Freund)
</p><p> This avoids problems with missed floating point overflow checks.
</p></li><li class="listitem"><p> Fix <span class="application">configure</span>'s detection of the result
type of <code class="function">strerror_r()</code> (Tom Lane)
</p><p> The previous coding got the wrong answer when building
with <span class="application">icc</span> on Linux (and perhaps in other
cases), leading to <span class="application">libpq</span> not returning
useful error messages for system-reported errors.
</p></li><li class="listitem"><p> Update time zone data files to <span class="application">tzdata</span>
release 2018g for DST law changes in Chile, Fiji, Morocco, and Russia
(Volgograd), plus historical corrections for China, Hawaii, Japan,
Macau, and North Korea.
</p></li></ul></div></div></div><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navfooter"><hr></hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="release-10-7.html" title="E.17. Release 10.7">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="release.html" title="Appendix E. Release Notes">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="release-10-5.html" title="E.19. Release 10.5">Next</a></td></tr><tr><td width="40%" align="left" valign="top">E.17. Release 10.7 </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 10.23 Documentation">Home</a></td><td width="40%" align="right" valign="top"> E.19. Release 10.5</td></tr></table></div></body></html>